Have you ever wondered how rocks are polished, stones are cut and jewelry is made? Come see behind the scenes at our Open House at the Castro Valley Gem and Mineral Society workshop on Sunday, April 30th from 9am to 2pm. The workshop is located at 20948 Corsair Blvd. #A, Hayward, CA, 94545.
Come join us for family friendly activities like spinning wheels, geode cracking, rock sales & more. If you want to get more involved we will have information on how to become a member so you can join in the fun!
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